Propeller or blower



y I i C. DECRETTE PROPELLER OR BLOWER Filed July 19 1924 INVENTOR r ILZDecreIte v BY ATTORNEY Patented May 4, 1926.

CHARLES 'nncnn'rrn, or nnw Yams. Y. a

rnornrnnn on BLowEn.

T 0 all whom it may concern:

' Be it known that 1, CHARLES Dncnn'rrn, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Propellers orBlowers, of which the following is a specification.

7 he main object of this invention is to provide a propeller which alsomaybe efficiently used as a blower. The device when used as a propellerdecreases thehead re sistance to a minimum. The propeller is.

constructed in the form ofa whirling drum with blades set at a slightangle.

Another object is to providemeans on the propeller or blower whereby allthe blades, which are independently mounted, may have their pitch variedin unison.

These and other'objects will become apparent in the description below,in which characters of reference refer to like-named.

parts in the drawing. 7

Referring briefly to the drawing, Figure 1 is a front elevational viewof the device.

Figure 2 is a longitudinal sectional elevational view of the same.

Figure 3 is a rear and elevational view of Figure 1.

Figure 4 is a partly sectioned side elevational view of the bladeadjuster ring.

Figure 5 is a front elevational View of Figure 4.

Figure 6 is a perspective View of a section of the device showing themethod of moving the blades.

Referring 1n detail to the drawing, the

numeral 10 indicatesthe circular wall of acylinder. Said :cylinder isopen at "both ends and at its forward end a plurality of ribs 11 extendoutwardly and toward the axis of the cylinder. The adjacent ends of theribs join each other at a common vertex, and at the latter position asleeve 12 is fixed to the ribs. The sleeve hasa longitudinal openingtherein in which one end of'a shaft 13 is rotatably journalled; saidshaft being adapted to be rotated by a source of power such as a motor,not shown, together with the remainder of the device. The shaft issupported near both its ends on brackets 14 which are mounted on a frame15, the latter serving as a support for the entire device. At the rearof the cylinder a ring 16 encircles the interior of the cylinder and isper- Application filed iuiyl s, 924. serial mvasea manently secured inplace by rivets'or the like. A, hollowhub -'17 having faces 18, is

mounted on'the shaft, one of said faces be ing removable so thlat theblade adjusting (i0 mechanism may be mounted in the chamber 19. Theannular space between the ring16' and the hub 17 is utilized by aplurality of j blades 20 which are curved longitudinally V and arepivoted at one end on a pin which is anchored on the hub and passes thruone of the webs 21 of the blade at one corner thereof. The same web atthe opposite corner has a pin 22 which extends thru a rectangularopening23 cut into the peripheral wall of the hub. Within the chamber 19of the hub, a blade adjuster ring 24 is rotatably mounted. Said ring hasan internal periphery on which gear teeth 25. are formed and theexternal periphery has a plurality of angular channels 26in which theends of the pins 22, which-project thru the opening 23 of the hub,register. A thumbscrew 27 is rotatably mounted in the outer wall 18 ofthe hub and has a shank thereon which passes thru said wall18 into thechamber 19 in which a pinion 28 is located. The pinion is rigidlymounted on the shank of member 27 and meshes with the teeth 25 of theblade adjuster ring 24.

In using the device as a propeller or blower, the shaft 13 on which theentire device-is mounted, is coupled to a motor or 'the like, or anydevice which will transmit rotation of the shaft, said'ineans not beingshown on the drawing. When using the de- Vice as a blower, air entersthru the openings'between the bladesv 20, as the latter where theyoverlap each other, are spaced apart. When using this device as ablower, the opposite end of the hub would be anchored Within a room 'orchamber, and'the other end in which the blades 20 are mounted, would beexterior of the chamber or room. The amount of air drawn in by theblades may be varied thru adjustment of the blades. Adjustment of theblades is accomplished by rotation of the thumb screw 27. As the pinion28 is rigidly attached to the shank of the thumb screw and meshes withthe adjuster ring 24, the latter 22 at one of its ends engaged in aninclined channel 26 will be moved transversely or substantially parallelto the axis of the shaft 13 and thus decrease or increase the space willbe rotated. Each blade having a pin of each adjacent pair of blades, theentire blades being moved in unison by the adjuster ring 24 in eitherdirection.

I claim In a blower or propeller, a cylindrical body open at both ends,a plurality of blades mounted in said body, said blades being curvedlongitudinally to conform to the pe riphery of thebody, the; bladesbeing normally inclined to provide a space between each pair of bladesat adjacent ends, the ends of said blades overlapping inspaced-apartstaggered relation, an annular hub supporting said blades onits periphery, said hub having openings at the free ends of said blades,a pin on the free end of each blade passing thru the opening in the hub,an adjuster ring rotatable in said hub and having inclined channelsformed on its periphery, the pins on the free ends of said blades beingadapted to register 1n said channels, said ring when rotated beingadapted to swing the blades about the fixed pivot, and means forrotating said adjuster ring. 7 l v In testimony whereof I affix mysignature.

CHARLESDEGRETTE.

